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Ivenika [448]
3 years ago
15

Which development was a direct result of the

Chemistry
1 answer:
Alex3 years ago
5 0
Increase in suburbanization
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Which of the following best predicts the outcome of a fusion reaction involving isotopes of hydrogen?
blagie [28]
The correct answer would be the second option. The outcome of a fusion reaction which involves isotopes of hydrogen would be the nuclei of the hydrogen isotopes join together to form a heavier element, and energy is released. A fusion reaction is a nuclear reaction which involves at least two nuclei or atoms combining forming products that are heavier than the reactants. Along with the formation of a new atomic nuclei, energy is released. Fusion of two isotopes of hydrogen, specifically deuterium and tritium, results to the formation of a neutron and a helium-3 atom atom. This reaction happens in the core of the Sun.
4 0
4 years ago
A sample of milk kept at 25 °C is found to sour 40 times as rapidly as when it is kept at 4 °C. Estimate the activation energy f
irga5000 [103]

Answer:

120.575 kJ is the activation energy for the souring process.

Explanation:

The formula for an activation energy is given as:

\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

K_1 = rate constant at 25^oC = 40k

K_2 = rate constant at 4^oC = k

Ea = activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

T_1 = initial temperature = 25^oC=273+25=298 K

T_2 = final temperature = 4^oC=273+4=277 K

Now put all the given values in this formula, we get:l

\log (\frac{k}{40k})=\frac{Ea}{2.303\times 8.314 J/mol K}[\frac{1}{298K}-\frac{1}{277 K}]

E_a=120,575.61J=120.575 kJ

120.575 kJ is the activation energy for the souring process.

7 0
4 years ago
Which of the quantum numbers relate(s) to the electron only? Which relate(s) to the orbital?
olganol [36]

Answer:

Schrodinger's proposal, considered as the 5th atomic model, is to describe the characteristics of all the electrons in an atom, and for this I use what we know as quantum numbers.

Quantum numbers are called with the letters n, m, l and s and indicate the position and energy of the electron. No electron of the same atom can have the same quantum numbers.

Explanation:

n = main quantum number, which indicates the level of energy where the electron is, assumes positive integer values, from 1 to 7 and it is related to the orbital too.

I = secondary quantum number, which indicates the orbital in which the electron is located, can be s, p, d and f (0, 1, 2 and 3).

m = magnetic quantum number, represents the orientation of the orbitals in space, or the type of orbital, within a specific orbital. Assumes values ​​of the negative secondary quantum number (-l) through zero, to the positive quantum number (+ l).

s = quantum number of spin, which describes the orientation of the electron spin. This number takes into account the rotation of the electron around its own axis as it moves around the nucleus. Assumes only two values ​​+1/2 and - 1/2

5 0
3 years ago
Which element, when combined with Iodine, would most likely form an ionic compound?
uranmaximum [27]

In an ionic compound the atoms are linked via ionic bonds. These are formed by the transfer of electrons from one atom to the other. The atom that loses electrons gains a positive charge whereas the atom that accepts electrons gains a negative. This happens in accordance with the octet rule wherein each atom is surrounded by 8 electrons

In the given example:

The valence electron configuration of Iodine (I) = 5s²5p⁵

It needs only one electron to complete its octet.

In the given options:

K = 4s¹

C = 2s²2p²

Cl = 3s²3p⁵

P = 3s²3p³

Thus K can donate its valence electron to Iodine. As a result K, will gain a stable noble gas configuration of argon while iodine would gain an octet. This would also balance the charges as K⁺I⁻ creating a neutral molecule.

Ans: Potassium (K)

4 0
3 years ago
Difference between cold process soap making and hot process soap making​
stepladder [879]

Answer:

Unlike cold process soap, the essential oils or fragrance/additives are added after gel phase. ... Cold process soap heats from the inside out, while hot process soap heats from the outside in. Unlike cold process soap, that lasts for 4-6 weeks, hot process soap can be used immediately after it hardens.

Explanation:

hope it helps you

7 0
3 years ago
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